Si Phan Don in the context of Cambodia–Laos border

A pirogue (/pɪˈroʊɡ/ or /ˈpiːroʊɡ/), also called a piragua or piraga, is any of various small boats, particularly dugouts and canoes. The word is French and is derived from the Spanish piragua [piˈɾaɣwa], which comes from the Carib piraua.

Don Det (Lao: ດອນເດດ) is an island in the Mekong River in the Si Phan Don ("Four Thousand Islands") archipelago in Champasak Province of southern Laos.

Champasak (or Champassak, Champasack – Lao: ຈຳປາສັກ [t͡ɕàm pàː sák]) is a province in southwestern Laos, near the borders with Thailand and Cambodia. It is 1 of the 3 principalities that succeeded the Lao kingdom of Lan Xang. As of the 2015 census, it had a population of 694,023. The capital is Pakse, and the province takes its name from Champasak, the former capital of the Kingdom of Champasak.

Champasak is bordered by Salavan province to the north, Sekong province to the northeast, Attapeu province to the east, Cambodia to the south, and Thailand to the west. The Mekong River forms part of the border with neighboring Thailand and contains Si Phan Don ('Four Thousand Islands') in the south of the province, on the border with Cambodia.